Power-transmitting gear.



No. 825,815. PATENTED JULY 10, 1906.

' s. E. PARNHAM.

POWER TRANSMITTING GEAR.

APPLIGTION FILED OGT.16. 1905.

2 SHEETS-SHEET I.4

I I i i f l@ @in HH ,Y Il.

F11 Q Il* "l x "Q21 O D l Q Ibm- Q MMI," y lllll yl a Q5 sg v2 T Q L ,o we o H c@ .M l `R In n m l Leo-e -4 i hb IIHml i b D i 1Q ;t i W. I' @memez 11 www.

I/ @wwwa/W PATENTED JULY 10, 1906.

s. E. PARNHAM.' POWER TRANSMITTING GEAR.

APPLICATION FILED 0OT.16. 1905.

V2 SHEETS-SHEET 2.

@MMWM We# @www v UNITED STATESPATFNT OFFICE.

SCHUYLER E. FARNHAM, OF RACINE, WISCONSIN, ASSIGNOR, BY MESNE ASSIGNMENTS, TO NATIONAL MFG. & MAILING CO., OF RACINE, WIS- CONSIN, A CORPORATION OF WISCONSIN.

POWER-TRANSMITTING GEAR.

Patented July 10, 1906.

Application filed October 16, 1905. Serial No. 282,929.

To all whom t may concer/L.

Be it known that I, SCHUYLER E. FARN- HAM, a citizen of the United States, and a resident of Racine, in the county of Racine and Sta-te of Wisconsin, have invented certain new and useful Improvements in Power- Transmitting Gearing; and I do hereby de- Clare that the following is a full, clear, and exact description thereof.

My invention consists in certain peculiarities of construction and combination of parts, hereinafter particularly set forth with reference to the accompanying drawings and subsequently claimed, its object being to provide simple, economical, compact, and efficient power-transmitting mechanism especially designed as a speed changing andreversing gear for a motor-vehicle, but which is just as applicable in whole or in part to a variety of machines, important features of the mechanism being the accessibility of its various elements and the provision had for ready compensation for wear of parts of its clutch connections.

Figure l of the drawings represents a plan view of power-transmitting mechanism in accordance with my invention and partly in horizontal section; Fig. 2, a sectional view indicated by lines 2 2 m Fig. l, and Fig. 3 a partly-sectional plan view of a fragment of a clutch portion of the mechanism.

Referring by letter to the drawings, A in-V dicates a frame or section of a casing constituting a support provided with bearings for a drive-shaft B, on which shaft a series of spurgears C, D, E, and F of varying size are keyed or otherwise fastened. Parallel to the shaft B is another shaft G, that is hereinafter referred to as the driven shaft. Loosely mounted on the shaft G is a series of spur-gears H, I, J, and Kof varying size. Extended and flanged hubs of the gears I-I K serve as bearings for the shaft G and are themselves in bearings with which the support A is provided. The gear O of the drive-shaft and the gear H of the driven shaft are in mesh with an interposed idlergear Il, loose on a stud t of the aforesaid support, and the gears D E F of said drive-shaft are, respectively, in mesh with the gears I J K on said driven shaft,the meshing of the several gears being permanent.

One side of the gear H is provided With clutch-teeth h, and one side of the gear K is provided with similar teeth 7c, whereby said gears are made to constitute clutch members of the mechanism herein specified. Seated in squared recesses in one side of the gear I are projecting blocks i of corresponding shape, and these blocks are virtually nuts on bolts c, extending through said gear. The gear J is similarly equipped with blocks y', and by means of their projecting side blocks both gears I J are made to constitute clutch menibers of the mechanism aforesaid.

The shaft G is hollow for a ortion of its length, and at intervals longituddnally of said shaft are slots d, that communicate with its bore. Guided in the shaft-bore is a rod M, and engaging the slots in said shaft are pins n o p, that extend through the rod and are fast in the same. Wedge-rim collars N O and a s anner-collar P are shown loose on the shaft Gp and fast on the pins aforesaid. One side of the collarN is provided with clutchteeth h and one side of the collar P is pro-V vided with similar teeth c, whereby Said collars are made to constitute clutch members and respectively coperate with the combined gear and clutch members II K, above described. The Spanner end of the lever Q engages the collar P, and this lever is fulcrumed in connection with the support A, its other end being shown in connection with a throw rod or link R for attachment to a I/IlOIe. or less distant actuating device. It is within the scope of my invention to omit the collars N O and to substitute keys for the ins a 0, that extend through the rod M and ongitudinal slots of the driven shaft. It is also practical to use means other than what is herein specified for shifting said rod and clutching the same With the otherwise kloose gear K on the driven shaft.

The loosely-mounted gears I J are caught between shaftcollars e f and spiders S T, these spiders being keyed or otherwise fastened on the shaft G, and each of them is provided with housings r for spiral springs s, that surround the squared Shanks of headed dogs, these shanks being guided in corresponding a ertures in said housings and serving as cfi1tch-teeth whereby said spiders are made to constitute clutch members of the herein- IOO Aspeed than before.

described mechanism. Fulcrumed in connection with ears of the spider S are bellcrank levers U, and similar levers V are fulcrumed in connection with ears of the spider T. One arm of each bell-crank lever U abuts the head of a spring-controlled dog c of the spider S, and the other arm of said lever is provided with an antifriction-roller in the path'of the wedge-collar N or its equivalent in connection with the rod M, that is adjustable in the shaft G, longitudinally of the same. One arm of each bell-crank lever V abuts the head of a spring-controlled dog e of the spider T, and the other arm of said lever is provided with an antifriction-roller in the path of the wedge-collar O or its equivalent in connection with the aforesaid rod.

From the foregoing it will be understood that when the rod M is in one position of its adjustment and the drive-shaft is turning, the several gears H, I, J, and K will run loose on the shaft G, that is then at rest. The lever Q, being moved in the proper direction, the wedge-collar N or its equivalent in connection with the rod M will operate the bellcrank levers U to shoot the dogs u of the spider S against sprin' resistance into position to `come into a utment against the blocks or clutch-teeth i of the gear I, thus putting said gear into clutch with the shaft G, that is now driven at a predetermined speed. Further movement of the rod M in thev same direction will result in an operation of the bell-crank levers V by the wedge-collar O or its equivalent to shoot the dogs o of the spider T against spring resistance into position to come into abutment against the blocks or clutch-teeth j of the gear J, whereby said gear is put into clutch with the shaft G,. that is now driven at a predetermined higher Further movement of the rod M in the same direction as before will result in a clutch of the spanner-collar P or its 'equivalent with the gear K to drive the shaft G at maximum speed while the other gears on the same shaft run idle.

The speed of the driven shaft maybe gradually reduced by a step-by-step reverse adjustment of the rod M, or it may be put immediately at slow speed or brought to a stop by the proper manipulation of said rod. If the reverse movement of the ,aforesaid rod is sufficient to brin the wedge-collar N or its equivalent into c utch with the gear H, the rotation of the driven shaft will be the reverse of what occurs when the gears I, J, or K are clutched therewith. From time to time, as op ortunity aords, the dogs u o and bell-crank evers U V are automatically returned to normal position by expansion of the springs s, and said dogs and the blocksi y' may be shifted a quarter-turn from time to time to compensate for the wear that comes upon their contact-surfaces.

`Having thus described my invention, what I claim as new, and desire to secure byLetters Patent, is-

1. The combination of paralleldriving and driven shafts, gears of varying size fast on one of the shafts, corresponding gears loosely mounted on the other shaft each in mesh with a fixed gear and provided with side teeth to constitute alclutch member, other clutch members fast on the shaft for the loosely-'mounted gears, a rod adjustable longitudinally of the same shaft within the same, and means in connection with the rod and fixed clutch members for locking these fixed clutch members alternately in engagement with an opposing loosely-mounted gear.

2. The combination of parallel driving and driven shafts, gears of varying size fast on one of the shafts, corresponding gears loosely mounted on the other shaft each in mesh with a fixed gear and provided with side teeth to constitute a clutch member, spiders fast on the shaft for the loosely-mounted gears, spring-controlled sliding dogs carried by the spiders, bell-crank levers in connection with said spiders and arranged to coincide with said dogs, a rod adjustable longitudinally of the shaft with which the aforesaid spiders are rigid, and means in conjunction with the rod to actuate the bell-crank levers and thereby shoot the aforesaid dogs against spring resistance into position to catch against the side teeth of loosely-mounted gears.

3. The combination of parallel driving and driven shafts, gears of varying size fast on one of the shafts, corresponding gears loosely mounted on the other shaft, each in mesh with a ixed gear and provided with side teeth to constitute a clutch member, other clutch members fast on the shaft for the loosely-mounted gears, a rod adjustable longitudinally of the same shaft Within the same, means in connection with the rod and xed clutch members for locking each of these fixed clutch members one at atime inengagement with an opposing loosely-mounted gear, and means also in connection with said rod for clutching the adjacent shaft with another of said loosely-mounted gears.

v 4. The combination of parallel driving and driven shafts, gears of varying size fast onV one of the shafts, corresponding gears loosely mounted on the other shaft and each provided with side teeth to constitute a clutch member, certain of these loosely-mounted gears being in mesh with fixed gears, an idlergear in mesh with a fixed ear and a looselymounted gear, other clutc members fast on the shaft for the loosely-mounted gears, arod adjustable longitudinally of the same shaft within the same, means in connection with the rod and fixed clutch members for locking these fixed clutch members one at a time in engagement with an opposing looselymounted gear, and means also in connection.

IOO

IIO

with said rod for clutching the adjacent shaft with the loosely-mounted gear in mesh With the idler-gear.

5. The combination of parallel driving and driven shafts, gears of varying size fast on one of the shafts, corresponding gears loosely mounted on the other shaft and each provided With side teeth to constitute a clutch member, certain of these loosely-mounted gears being in mesh With fixed gears, an idlergear in mesh with a fixed gear and a looselymounted gear, other clutch members fast on the shaft for the loosely-mounted gears, a rod adjustable longitudinally of the same shaft Within the same, means in connection With the rod and fixed clutch members for locking these fixed clutch members one at a time in engagement With an opposing loosely-mounted gear, and means also in connection With said rod for clutching the adjacent shaft with a remaining loosely-mounted gear in mesh With a iixed gear and With the loosely-mounted gear in mesh With the idler-gear.

'6. The combination of a shaft, a rod adjustable in the shaft longitudinally of the same, gears loosely mounted on said shaft and provided With side teeth to constitute clutch members, spiders fast on the aforesaid shaft, spring-controlled sliding dogs carried by the spiders, bell-crank levers in connection With the fixed clutch members to coincide With said dogs, devices in connection with said rod for actuating the bell-crank levers to thereby shoot the dogs against spring resistance into position to catch against side teeth of loosely-mounted gears, other means in conjunction with said rod for clutching others of said loosely-mounted` gears in connection With the aforesaid shaft, an idler-gear in mesh With one of the looselymounted gears, another shaft, and fixed gears on the latter shaft one of Which is in mesh with the idler-gear and the remainder with loosely-mounted gears on the former shaft.

7. The combination of a driving and driven shaft, a iiXed gear on one of the shafts a corresponding gear loosely mounted on the other shaft in mesh with the fixed gear, squared blocks detachably seated in side recesses of the loosely-mounted gear to roject therefrom, a spider fast on the shaft or the looselymounted gear and provided With housings, spiral springs in the housings, dogs having heads opposing the springs and squared Shanks guided in corresponding apertures of said spider, and means for shooting the dogs into position to catch against the blocks aforesaid.

In testimony that I claim the foregoing I have hereunto set my hand, at Racine, in the county of Racine and State of Wisconsin, in the presence of tWo Witnesses.

SCHUYLER E. FARNHAM.

Witnesses:

ANDREW DIETRICH, LoUrs E. HALL, 

